util: rename qemu_*block() socket functions

The qemu_*block() functions are meant to be be used with sockets (the
win32 implementation expects SOCKET)

Over time, those functions where used with Win32 SOCKET or
file-descriptors interchangeably. But for portability, they must only be
used with socket-like file-descriptors. FDs can use
g_unix_set_fd_nonblocking() instead.

Rename the functions with "socket" in the name to prevent bad usages.

This is effectively reverting commit f9e8cacc55 ("oslib-posix:
rename socket_set_nonblock() to qemu_set_nonblock()").

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>

chardev/char-socket.c

@@ -311,7 +311,7 @@ static ssize_t tcp_chr_recv(Chardev *chr, char *buf, size_t len)
         }
 
         /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */
-        qemu_set_block(fd);
+        qemu_socket_set_block(fd);
 
 #ifndef MSG_CMSG_CLOEXEC
         qemu_set_cloexec(fd);

contrib/ivshmem-server/ivshmem-server.c

@@ -146,7 +146,7 @@ ivshmem_server_handle_new_conn(IvshmemServer *server)
         return -1;
     }
 
-    qemu_set_nonblock(newfd);
+    qemu_socket_set_nonblock(newfd);
     IVSHMEM_SERVER_DEBUG(server, "accept()=%d\n", newfd);
 
     /* allocate new structure for this peer */

hw/hyperv/syndbg.c

@@ -334,7 +334,7 @@ static void hv_syndbg_realize(DeviceState *dev, Error **errp)
         return;
     }
 
-    qemu_set_nonblock(syndbg->socket);
+    qemu_socket_set_nonblock(syndbg->socket);
 
     syndbg->servaddr.sin_port = htons(syndbg->host_port);
     syndbg->servaddr.sin_family = AF_INET;

hw/virtio/vhost-user.c

@@ -1826,7 +1826,7 @@ static int vhost_user_postcopy_advise(struct vhost_dev *dev, Error **errp)
         error_setg(errp, "%s: Failed to get ufd", __func__);
         return -EIO;
     }
-    qemu_set_nonblock(ufd);
+    qemu_socket_set_nonblock(ufd);
 
     /* register ufd with userfault thread */
     u->postcopy_fd.fd = ufd;

include/qemu/sockets.h

@@ -17,9 +17,9 @@ int qemu_socket(int domain, int type, int protocol);
 int qemu_accept(int s, struct sockaddr *addr, socklen_t *addrlen);
 int socket_set_cork(int fd, int v);
 int socket_set_nodelay(int fd);
-void qemu_set_block(int fd);
-int qemu_try_set_nonblock(int fd);
-void qemu_set_nonblock(int fd);
+void qemu_socket_set_block(int fd);
+int qemu_socket_try_set_nonblock(int fd);
+void qemu_socket_set_nonblock(int fd);
 int socket_set_fast_reuse(int fd);
 
 #ifdef WIN32

io/channel-socket.c

@@ -460,7 +460,7 @@ static void qio_channel_socket_copy_fds(struct msghdr *msg,
             }
 
             /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */
-            qemu_set_block(fd);
+            qemu_socket_set_block(fd);
 
 #ifndef MSG_CMSG_CLOEXEC
             qemu_set_cloexec(fd);
@@ -665,9 +665,9 @@ qio_channel_socket_set_blocking(QIOChannel *ioc,
     QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
 
     if (enabled) {
-        qemu_set_block(sioc->fd);
+        qemu_socket_set_block(sioc->fd);
     } else {
-        qemu_set_nonblock(sioc->fd);
+        qemu_socket_set_nonblock(sioc->fd);
     }
     return 0;
 }

net/l2tpv3.c

@@ -716,7 +716,7 @@ int net_init_l2tpv3(const Netdev *netdev,
     s->vec = g_new(struct iovec, MAX_L2TPV3_IOVCNT);
     s->header_buf = g_malloc(s->header_size);
 
-    qemu_set_nonblock(fd);
+    qemu_socket_set_nonblock(fd);
 
     s->fd = fd;
     s->counter = 0;

net/socket.c

@@ -297,7 +297,7 @@ static int net_socket_mcast_create(struct sockaddr_in *mcastaddr,
         }
     }
 
-    qemu_set_nonblock(fd);
+    qemu_socket_set_nonblock(fd);
     return fd;
 fail:
     if (fd >= 0)
@@ -522,7 +522,7 @@ static int net_socket_listen_init(NetClientState *peer,
         error_setg_errno(errp, errno, "can't create stream socket");
         return -1;
     }
-    qemu_set_nonblock(fd);
+    qemu_socket_set_nonblock(fd);
 
     socket_set_fast_reuse(fd);
 
@@ -570,7 +570,7 @@ static int net_socket_connect_init(NetClientState *peer,
         error_setg_errno(errp, errno, "can't create stream socket");
         return -1;
     }
-    qemu_set_nonblock(fd);
+    qemu_socket_set_nonblock(fd);
 
     connected = 0;
     for(;;) {
@@ -688,7 +688,7 @@ static int net_socket_udp_init(NetClientState *peer,
         closesocket(fd);
         return -1;
     }
-    qemu_set_nonblock(fd);
+    qemu_socket_set_nonblock(fd);
 
     s = net_socket_fd_init(peer, model, name, fd, 0, NULL, errp);
     if (!s) {
@@ -730,7 +730,7 @@ int net_init_socket(const Netdev *netdev, const char *name,
         if (fd == -1) {
             return -1;
         }
-        ret = qemu_try_set_nonblock(fd);
+        ret = qemu_socket_try_set_nonblock(fd);
         if (ret < 0) {
             error_setg_errno(errp, -ret, "%s: Can't use file descriptor %d",
                              name, fd);

qga/channel-posix.c

@@ -34,7 +34,7 @@ static gboolean ga_channel_listen_accept(GIOChannel *channel,
         g_warning("error converting fd to gsocket: %s", strerror(errno));
         goto out;
     }
-    qemu_set_nonblock(client_fd);
+    qemu_socket_set_nonblock(client_fd);
     ret = ga_channel_client_add(c, client_fd);
     if (ret) {
         g_warning("error setting up connection");

tests/unit/socket-helpers.c

@@ -88,7 +88,7 @@ static int socket_can_bind_connect(const char *hostname, int family)
         goto cleanup;
     }
 
-    qemu_set_nonblock(cfd);
+    qemu_socket_set_nonblock(cfd);
     if (connect(cfd, (struct sockaddr *)&ss, sslen) < 0) {
         if (errno == EINPROGRESS) {
             check_soerr = true;

tests/unit/test-crypto-tlssession.c

@@ -90,8 +90,8 @@ static void test_crypto_tls_session_psk(void)
      * thread, so we need these non-blocking to avoid deadlock
      * of ourselves
      */
-    qemu_set_nonblock(channel[0]);
-    qemu_set_nonblock(channel[1]);
+    qemu_socket_set_nonblock(channel[0]);
+    qemu_socket_set_nonblock(channel[1]);
 
     clientCreds = test_tls_creds_psk_create(
         QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT,
@@ -244,8 +244,8 @@ static void test_crypto_tls_session_x509(const void *opaque)
      * thread, so we need these non-blocking to avoid deadlock
      * of ourselves
      */
-    qemu_set_nonblock(channel[0]);
-    qemu_set_nonblock(channel[1]);
+    qemu_socket_set_nonblock(channel[0]);
+    qemu_socket_set_nonblock(channel[1]);
 
 #define CLIENT_CERT_DIR "tests/test-crypto-tlssession-client/"
 #define SERVER_CERT_DIR "tests/test-crypto-tlssession-server/"

util/oslib-posix.c

@@ -224,20 +224,20 @@ void qemu_anon_ram_free(void *ptr, size_t size)
     qemu_ram_munmap(-1, ptr, size);
 }
 
-void qemu_set_block(int fd)
+void qemu_socket_set_block(int fd)
 {
     g_unix_set_fd_nonblocking(fd, false, NULL);
 }
 
-int qemu_try_set_nonblock(int fd)
+int qemu_socket_try_set_nonblock(int fd)
 {
     return g_unix_set_fd_nonblocking(fd, true, NULL) ? 0 : -errno;
 }
 
-void qemu_set_nonblock(int fd)
+void qemu_socket_set_nonblock(int fd)
 {
     int f;
-    f = qemu_try_set_nonblock(fd);
+    f = qemu_socket_try_set_nonblock(fd);
     assert(f == 0);
 }
 

util/oslib-win32.c

@@ -184,14 +184,14 @@ static int socket_error(void)
     }
 }
 
-void qemu_set_block(int fd)
+void qemu_socket_set_block(int fd)
 {
     unsigned long opt = 0;
     WSAEventSelect(fd, NULL, 0);
     ioctlsocket(fd, FIONBIO, &opt);
 }
 
-int qemu_try_set_nonblock(int fd)
+int qemu_socket_try_set_nonblock(int fd)
 {
     unsigned long opt = 1;
     if (ioctlsocket(fd, FIONBIO, &opt) != NO_ERROR) {
@@ -200,9 +200,9 @@ int qemu_try_set_nonblock(int fd)
     return 0;
 }
 
-void qemu_set_nonblock(int fd)
+void qemu_socket_set_nonblock(int fd)
 {
-    (void)qemu_try_set_nonblock(fd);
+    (void)qemu_socket_try_set_nonblock(fd);
 }
 
 int socket_set_fast_reuse(int fd)

util/vhost-user-server.c

@@ -65,7 +65,7 @@ static void vmsg_unblock_fds(VhostUserMsg *vmsg)
 {
     int i;
     for (i = 0; i < vmsg->fd_num; i++) {
-        qemu_set_nonblock(vmsg->fds[i]);
+        qemu_socket_set_nonblock(vmsg->fds[i]);
     }
 }
 
@@ -270,7 +270,7 @@ set_watch(VuDev *vu_dev, int fd, int vu_evt,
 
         vu_fd_watch->fd = fd;
         vu_fd_watch->cb = cb;
-        qemu_set_nonblock(fd);
+        qemu_socket_set_nonblock(fd);
         aio_set_fd_handler(server->ioc->ctx, fd, true, kick_handler,
                            NULL, NULL, NULL, vu_fd_watch);
         vu_fd_watch->vu_dev = vu_dev;